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Preparation method of proton exchange membrane fuel cell catalyst

A proton exchange membrane, fuel cell technology, applied in solid electrolyte fuel cells, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low electrochemical performance, difficult to prepare catalysts, metal particle catalyst particle size uniformity decreased and other problems, to achieve the effect of uniform particle size and high electrochemical performance

Active Publication Date: 2015-01-14
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to prepare a catalyst with a uniform microscopic state by the above-mentioned methods, and the obtained catalyst generally produces the aggregation of metal particles, and the uniformity of the particle size of the catalyst decreases, resulting in low electrochemical performance.

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  • Preparation method of proton exchange membrane fuel cell catalyst
  • Preparation method of proton exchange membrane fuel cell catalyst
  • Preparation method of proton exchange membrane fuel cell catalyst

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preparation example Construction

[0034] The invention provides a kind of preparation method of proton exchange membrane fuel cell catalyst, comprises the following steps:

[0035] A) Mix the noble metal halide solution and carbon black, adjust the pH value to 2.5~10.5, and perform ultrasonic stirring to obtain the precursor fluid;

[0036] The noble metal halide is platinum halide or a mixture of platinum halide and ruthenium halide;

[0037] B) adding the precursor liquid into the sodium borohydride solution, and obtaining a mixed liquid after ultrasonic stirring;

[0038] C) The mixed solution is left to stand, filtered, washed and dried to obtain a proton exchange membrane fuel cell catalyst.

[0039] In the invention, firstly, carbon black is added into the noble metal halide solution for mixing, the pH value of the solution is adjusted, and ultrasonic stirring is carried out to obtain the precursor liquid. The noble metal halide is a mixture of platinum halide or platinum halide and ruthenium halide, w...

Embodiment 1

[0050] Dissolve chloroplatinic acid in deionized water to prepare 1L of aqueous solution, wherein the platinum ion content in the solution is 5g / L, add carbon black to the chloroplatinic acid solution for adsorption, so that the load of chloroplatinic acid on the carbon black is 20wt %, ultrasonically stirred to obtain a suspension, heated the suspension to 50°C and kept for 1 hour, adjusted the pH value of the suspension to 7.5 with ammonia solution, and stirred the suspension under ultrasonic conditions for 30 minutes to obtain a precursor liquid.

[0051] Take 1 g of sodium borohydride and add it to 10 mL of deionized water to prepare a sodium borohydride solution.

[0052] The precursor liquid was quickly poured into the sodium borohydride solution while ultrasonically agitating for 1 hour to obtain a mixed liquid.

[0053] The mixed solution was left to stand for 1 hour, filtered to obtain a solid substance, and the solid substance was washed with deionized water until th...

Embodiment 2

[0063] Dissolve chloroplatinic acid / chlororuthenic acid in deionized water to prepare 1L of aqueous solution, wherein the content of platinum ion and ruthenium ion in the solution is 5g / L, and the molar ratio of platinum and ruthenium is 1:0.5, to chloroplatinic acid / Add carbon black to the chlororuthenic acid solution for adsorption, so that the load of chloroplatinic acid / chlororuthenic acid on the carbon black is 60wt%, ultrasonically stir to obtain a suspension, heat the suspension to 50 ° C, keep it for 1 hour, and use The ammonia solution adjusts the pH value of the suspension to 7.5, and the suspension is stirred under ultrasonic conditions for 30 minutes to obtain a precursor liquid.

[0064] Take 5 g of sodium borohydride and add it into 10 mL of deionized water to prepare a sodium borohydride solution.

[0065] The precursor liquid was quickly poured into the sodium borohydride solution while ultrasonically agitating for 1 hour to obtain a mixed liquid.

[0066] Th...

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Abstract

The invention provides a preparation method of a proton exchange membrane fuel cell catalyst. The preparation method comprises the following steps of: mixing a noble metal halide solution and carbon black, adjusting the pH value to 2.5-10.5, and then carrying out ultrasonic wave stirring to obtain precursor liquid, wherein the noble metal halide solution is platinum halide or a mixture of platinum halide and ruthenium halide; adding the precursor liquid to a sodium borohydride solution, and carrying out ultrasonic wave stirring to obtain a mixed liquid; and standing, filtering, washing and drying the mixed liquid to obtain the proton exchange membrane fuel cell catalyst. The proton exchange membrane fuel cell catalyst prepared by the method has uniform particle size and high electrochemical performance.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a method for preparing a proton exchange membrane fuel cell catalyst. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a new type of device that can directly convert chemical energy into electrical energy. Since the proton exchange membrane battery has no internal energy consumption of rotating parts and does not undergo combustion, the energy conversion efficiency is not limited by the Carnot cycle, so it has a relatively high energy conversion efficiency. Moreover, the proton exchange membrane battery uses clean energy, such as hydrogen and methanol, without sulfur oxide and nitride emissions, no harm to the environment, and high environmental protection. Proton exchange membrane batteries also have the characteristics of mild working conditions, small size, light weight, safety and durability, and are widely used as mobile power sources, and they are also i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42B01J23/46H01M4/92H01M8/10
CPCY02E60/521Y02E60/50
Inventor 刘长鹏梁亮廖建辉李晨阳邢巍
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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